Hi all,
I've a Yamaha RX-V373 which does not power up, only main relay clicks and then falls back, already checked the following:
- DIAG or Advanced menu does not work
- All relevant sub voltages are available (5-7-12V)
- According to the SM,IC's 268-262 and 261 should give 1.3V, 1.2V and 3.3V but at all I measure around 7V at pin 1 (so output voltage is equal to input voltage 7V)
- As a try I swapped IC-262 for a new one but still measuring 7V output.
- As these 1.3,1.2 and 3.3V voltages are feeding processors (a.o. uP and DSP) I assume this is the reason why the unit doesn't start up due to the voltage errors. For now I'm stuck where to look further and am hoping that someone had the same issue and can provide some tips/guidelines. Any help is welcome.
I've a Yamaha RX-V373 which does not power up, only main relay clicks and then falls back, already checked the following:
- DIAG or Advanced menu does not work
- All relevant sub voltages are available (5-7-12V)
- According to the SM,IC's 268-262 and 261 should give 1.3V, 1.2V and 3.3V but at all I measure around 7V at pin 1 (so output voltage is equal to input voltage 7V)
- As a try I swapped IC-262 for a new one but still measuring 7V output.
- As these 1.3,1.2 and 3.3V voltages are feeding processors (a.o. uP and DSP) I assume this is the reason why the unit doesn't start up due to the voltage errors. For now I'm stuck where to look further and am hoping that someone had the same issue and can provide some tips/guidelines. Any help is welcome.
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